Closed loop quantization of higher order ambisonic coefficients
AssigneeQUALCOMM Incorporated
InventorsMoo Young Kim, Nils Günther Peters, Dipanjan Sen
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Abstract
In general, techniques are described for closed loop quantization of HOA coefficients that provide a three-dimensional representation of the sound field. An audio encoding device may perform closed loop quantization of an audio object based at least in part on a result of performing quantization of directional information associated with the audio object. An audio decoding device may obtain an audio object that has been closed loop quantized based at least in part on a result of performing quantization of directional information associated with the audio object, and may dequantize the audio object.
Claims32
A method for quantizing a foreground audio signal, comprising:
- receiving, by at least one processor, audio data indicative of Higher Order Ambisonics (HOA) coefficients captured by a microphone;
- decomposing, by the at least one processor, an audio object and directional information associated with the audio object from the HOA coefficients;
- and
- performing, by the at least one processor, closed loop quantization of the audio object based at least in part on a result of performing quantization of the directional information associated with the audio object.
A device for quantizing a foreground audio signal, comprising:
- at least one processor configured to:
- receive audio data indicative of Higher Order Ambisonics (HOA) coefficients captured by a microphone;
- decompose an audio object and directional information associated with the audio object from the HOA coefficients;
- and
- perform closed loop quantization of the audio object based at least in part on a result of performing quantization of the directional information associated with the audio object;
- and
- a memory configured to store the audio object and the directional information associated with the audio object.
A method for dequantizing an audio object, comprising:
- obtaining, by at least one processor, an audio object that has been closed loop quantized based at least in part on a result of performing quantization of directional information associated with the audio object;
- and
- dequantizing, by the at least one processor, the audio object;
- rendering, by the at least one processor using the dequantized audio object, loudspeaker feeds;
- and
- outputting, by the at least one processor, the loudspeaker feeds to drive one or more speakers to playback the loudspeaker feeds.
A device for dequantizing a foreground audio signal, comprising:
- a memory configured to store an audio object;
- at least one processor configured to:
- obtain the audio object that has been closed loop quantized based at least in part on a result of performing quantization of directional information associated with the audio object;
- dequantize the audio object;
- render, using the dequantized audio object, loudspeaker feeds;
- and
- output the loudspeaker feeds to drive one or more speakers to playback the loudspeaker feeds;
- and
- the one or more speakers configured to playback the loudspeaker feeds rendered from the dequantized audio object.
Dependencies are inferred from the claim text.